Mario Rosati

Wilson Sonsini Goodrich & Rosati PC

Mario M. Rosati has been with Wilson Sonsini Goodrich & Rosati since 1971, first as an associate and, since 1975, as a partner. Mario specializes in corporate law, especially as it relates to technology companies.

He serves as the managing partner of WS Investments, an investment partnership composed of the partners and associates of the firm. WS Investments has invested in a number of emerging corporations over the years.

From 1994 to 2010, Mario was an adjunct professor at the University of California at Berkeley’s Haas School of Business, where he taught new venture finance. In 2012, he taught the same subject at the UC Berkeley School of Law (Boalt Hall).

Mario has sat as a judge pro-tem in the San Mateo County Superior Court. He also participated in the Innovation and Entrepreneurship Task Force to the office of the President Elect, Ronald Reagan.

In addition to the boards of the public companies mentioned below, Mario is a director of several privately held companies.


  • J.D., University of California, Berkeley, Boalt Hall School of Law, 1971
  • B.A., History, University of California, Los Angeles, 1968


  • Guest Lecturer, “New Venture Finance,” UC Berkeley School of Law (Boalt Hall), Fall 2012 and 2013
  • Adjunct Professor, “New Venture Finance,” University of California at Berkeley, Haas School of Business, Spring 1994 to 2010
  • Adjunct Professor, “Entrepreneurship,” University of California, Berkeley, Haas School of Business, Fall 1995
  • Guest Lecturer, “Forming and Financing the Venture,” Stanford Graduate School of Business, Winter 2000
  • Guest Lecturer, “Legal Considerations in an Emerging Growth Company,” Entrepreneurship, University of California, Berkeley, Haas School of Business, Fall 1994
  • Director, Aehr Test Systems
  • Director, Sanmina-SCI Corporation
  • Member, Band of Angels


  • State Bar of California


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What types of cases Attorney Mario Rosati & Wilson Sonsini Goodrich & Rosati PC can handle?
Wilson Sonsini Goodrich & Rosati PC can handle cases related to laws concerning Corporate, Mergers & Acquisitions. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Wilson Sonsini Goodrich & Rosati PC located?
Wilson Sonsini Goodrich & Rosati PC is located at 650 Page Mill Rd, Palo Alto, CA 94304, USA. You can reach out to Wilson Sonsini Goodrich & Rosati PC using their phone line 650-320-4621. You can also check their website or email them at [email protected].
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Wilson Sonsini Goodrich & Rosati PC
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Palo Alto 94304 CA US
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